lib-ext-backup: move snapshot cleanup code into the correct function

[monosys] / csv2txt

#!/usr/bin/env python3

import csv
import sys

rows = list(csv.reader(sys.stdin))
column_widths = list(max((len(str(cell))) for cell in column) for column in zip(*rows))
for row in rows:
    print("".join(str(cell).ljust(width+1) for cell, width in zip(row, column_widths)))